Yes. Each paid licence or evaluation version of TTWin 4 includes both a 32-bit version and a 64-bit version.
When purchasing or evaluating TTWin you will be provided with copies of both 32-bit and 64-bit install packages of the software.
For maintenance users, if you are currently using the 32-bit version of TTWin, when it comes time to upgrade you can download the latest 64-bit install package from the maintenance download area. Contact your Turbosoft representative for further details.